3D-rendered images of spheroid of living HeLa cells in SPA-SIM mode for two-photon activation
Description
3D-rendered images of living HeLa cell spheroids stably expressing rsGamillus-S-H2B to label nuclei were obtained using selective-plane-activation structured illumination microscopy (SPA-SIM) with two-photon activation and a scanned Bessel beam. rsGamillus-S is an acid-resistance photoswitchable fluorescent protein, which owns exceptionally high on-switching rate to show the nuclei more clearly. Two-photon activation using a scanned Bessel beam produces a wider FOV and a higher axial resolution.